Senior Power Electronics Firmware Engineer

Tonal·San Francisco, CA·Posted 5 November 2026

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About the role

OVERVIEW Tonal is looking for a Senior Power Electronics Firmware Engineer to develop the firmware for our motor drive and power systems. That drive generates up to 250 pounds of digital weight, so its firmware defines how Tonal feels to every member. You’ll contribute at every stage, from concept, prototyping, and bring-up through validation and high-volume production. You’ll join the Firmware team in our Hardware department, working closely with electrical, mechanical, and software engineers. Together, you’ll tackle challenges that span motor control, power conversion, thermal limits, and member safety. Our team offers a rare chance to shape the core technology of a new fitness category. WHAT YOU WILL DO - Develop and improve motor control and power management firmware that makes Tonal’s digital weight feel smooth and responsive - Add and maintain protection features, such as overcurrent and overtemperature handling, that keep members safe - Bring up and debug new boards in the lab with the electrical team - Test and tune motor performance, and help build the tools and automated tests that validate each release - Support manufacturing test and calibration, and…

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